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A method is disclosed for making an optical fiber by drawing a preform whose fabrication involves deposition of a glass on a substrate by means of a chemical reaction between gaseous reagents. According to the disclosed method, accurately controlled amounts of a gaseous reagent are produced by flash

A method is disclosed for making an optical fiber by drawing a preform whose fabrication involves deposition of a glass on a substrate by means of a chemical reaction between gaseous reagents. According to the disclosed method, accurately controlled amounts of a gaseous reagent are produced by flash evaporating a metered flow of a liquid reagent. The disclosed method is of particular interest for the industrial production of optical fibers.

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A method for fabricating an optical fiber by drawing a preform whose manufacture comprises depositing a glass on a substrate by means of a chemical reaction between at least two reagents forming a gaseous mixture, characterized in that the preparation of said gaseous mixture comprises the steps of (

A method for fabricating an optical fiber by drawing a preform whose manufacture comprises depositing a glass on a substrate by means of a chemical reaction between at least two reagents forming a gaseous mixture, characterized in that the preparation of said gaseous mixture comprises the steps of (1) supplying at least a first of said reagents in liquid form, (2) supplying a precisely metered flow of said first of said reagents to a flash evaporation chamber, and (3) flash evaporating said flow in said flash evaporation chamber.